Dialkyl resorcinols



in the purview of Patented Feb. 14, 1933 UNITED STATES PATENT OFFICE WALTER G. CHRISTENSEN, 0]! GLEN RIDGE, NEW JERSEY, AND SIDNEY E. HARRIS, 0F

LYNBBOOK, NEW YORK, ASBIGNORS TO E. R. BQUIBIB & SONS, OF NEW YORK, N. Y., A

DIALKYL RESOROINOLS In Drawing.

This invention relates to, and has for its object the provision of dialkyl resorcinols of the general formula (3 H (OH) R'R" wherein R and R" represent different alkyls one of which contains three or more carbon atoms.

Among the many dialkyl resorcinols withthe invention are the methyl propyl, the methyl butyl, the ethyl propyl, the methyl amyl, the ethyl butyl, the methyl hexyl, the ethyl amyl, the propyl butyl, the propyl amyl.

Methyl n-amyl resorcinol may be prepared by the process described in the following example: In a solution of 8.9 g. of n-amyl resorcinol in 100 cc. of dry ether, 10.4 g. of zinc cyanide is he t in suspension by agitation" and dry hy rogen chloride is introduce until saturation is reached, and then for an additional hour; and, the aldimide hydrochloride formed having settled out as an oil, the ether is decanted therefrom; the oil is washed with 50 cc. of dry ether, 7 5 cc. of hot water is added, and the remaining tracesof other are removed by evaporation on a steambath, a reddish sticky substance then separating out; the suspension is boiled; and, after cooling, the water is decanted from the precipitate, which is n-amyl resorcyl' aldehyde. This aldehyde is boiled with 50 g. of zinc amalgam and 100 cc. of 1-1 hydrochloric acid solution extraction is made with ether, the extract is washed with water and dried over sodium sulfate, and the ether is then removed by evaporation; the residue is distilled under vacuum and the fraction boiling at 165170 (ll/2.5 mm., which is methyl n-amyl resorcinol, is collected.

Ethyl butyl resorcinol may be repared by the process described in the 0 lowing example: A mixture of 20 g. of n-butyl resorclnol, 12 g. of acetic anhydridc, and 100 cc. of glacial acetic acid is refluxed for two hours, the acetic acid is distilled ofi under reduced pressure, and the residue, which is nbutyl resorcinol monoacetate (boiling at 147150 C/2.mm.), is then distilled. To 19 g. of this monoacetate, 8 g. of zinc chloride is added, the mixture is heated at 125-130" C. for five hours, diluted with 100 cc. of boiling Application filed July 7, 1932. Serial No. 621,300.

water, and thoroughly washed by blowing with steam; the mixture then bein allowed to separate, the water is decanted o and the residue distilled under reduced pressure; and the portion distilling at 164166 C./3 mm., which is n-butyl resacetophenone, is collected. A mixture of 10 g. of this resacetophenone with 34 g. of amalgamated zinc and 250 cc. of 20% hydrochloric acid solution is boiled until a test portion no longer ives a red color with ferric chloride, and en allowed to cool; and the oil, ethyl n-butyl resorcinol, is separated from the aqueous layer and distilled under reduced pressure, boiling at USO-151 C./2.5 mm.

N-propyl n-butyl resorcinol m a be prepared by the process described in the ollowing example: A mixture of 33 g. of n-butyl resorcino], 26 g. of propionic anhydride, and 100 cc. of propionic acid is refluxed for two hours, the propionic acid is distilled off under reduced pressure, and the residue, which is nbutyl resorcinol monopropionate (boiling at Mil-165 C./2 mm.) is then distilled. To 37 g. of this monopropionate 15 g. of zinc chloride is added, and the m1xture is heated at 125-130 G. for 4 hours, and the viscous oily product is washed with boiling water and distilled under reduced pressure, yielding nbutyl n-propionyl resorcinol, a yellow oil, which crystallizes on long standing. A mixture of 22 g. of this n-butyl n-propionyl resorcinal with 68 g. of amalgamated zinc and 400 cc. of 20% hydrochloric acid solution is refluxed and stirred until ferric chloride no longer gives a reaction with a test ortion; the mixture is allowed to cool, and t e oil is separated from the aqueous layer and distilled under reduced pressure, the boilin point being 153-160 C./3 mm. The disti la npropyl n-butyl resorcinol, is a viscous, colorless oil.

Dialkyl resorcinols of this invention are characterized by especial germicidal activity.

It is to be understood that the foregoing embodiments are merely illustrative and by no means limitative of the invention, whic may assume various other forms-as to the particular dialkyl resorcinols prepared and the reactants and procedures employedla C HAO RR" wherein within the scope of the appended claims.

resent dlfierent alkyls one of which contains three or more carbon atoms.

2. Methyl amyl resorcinol.

3. Ethyl butyl resorcinol.

4. Propyl butyl resorcinol.

In witness whereof we afiix our signatures.

WALTER G. CHRISTIANSEN. SIDNEY E. HARRIS.

DISCLAIMER 1,897,188.-Wa1ter G. Oltristiansen, Glen Ridge, N. J., and S1'd E. Harris, Lynbrcok, N. Y. DIALKYL Rnsoncmons. Patent dated ebi'uary 14, 1933. Disclaimer filed January 8, 1935, by the assignee, E. R. Squibb cf: Sons. Herebfi enters this disclaimer to that part of the claim in said specification which is in the 0 owing words, to wit:

l. Dial 1 resorcinols of the neral formula CJ-I,(OH),R'R" wherein R and R re resent erent alkyls one o which contains three or more carbon atoms.

[ Gazette February 6, 1935.]

la C HAO RR" wherein within the scope of the appended claims.

resent dlfierent alkyls one of which contains three or more carbon atoms.

2. Methyl amyl resorcinol.

3. Ethyl butyl resorcinol.

4. Propyl butyl resorcinol.

In witness whereof we afiix our signatures.

WALTER G. CHRISTIANSEN. SIDNEY E. HARRIS.

DISCLAIMER 1,897,188.-Wa1ter G. Oltristiansen, Glen Ridge, N. J., and S1'd E. Harris, Lynbrcok, N. Y. DIALKYL Rnsoncmons. Patent dated ebi'uary 14, 1933. Disclaimer filed January 8, 1935, by the assignee, E. R. Squibb cf: Sons. Herebfi enters this disclaimer to that part of the claim in said specification which is in the 0 owing words, to wit:

l. Dial 1 resorcinols of the neral formula CJ-I,(OH),R'R" wherein R and R re resent erent alkyls one o which contains three or more carbon atoms.

[ Gazette February 6, 1935.] 

